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    <head><title>Using a NAT Firewall</title>
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        <h1>
            <MadCap:keyword term="nat firewall" />Using a NAT Firewall</h1>
        <p>When using a NAT (Network Address Translation) firewall, you may encounter 
 problems when trying to use SSL encryption. To 
 fix this, you should configure WS_FTP and the firewall to allow incoming 
 connection to your PC. Pro needs to tell the server 
 to connect to the external IP address, and the firewall should forward 
 these incoming connection to your PC. You should 
 also limit the number of ports that the firewall open for these connections. 
 In many cases, this will allow you to use SSL through 
 a NAT firewall.&#160;&#160;&#160;&#160;</p>
        <h2>To configure SSL through a NAT Firewall:</h2>
        <ol style="list-style: decimal;list-style-type: decimal;">
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">From the 
 <span style="font-weight: bold;">Program</span> <![CDATA[ ]]><![CDATA[ ]]><span style="font-weight: bold;">Options</span>, 
 select the <span style="font-weight: bold;">SSL</span> dialog.</p>
            </li>
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">Select 
 the <span style="font-weight: bold;">Force PORT IP Address</span> dialog.</p>
            </li>
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">Enter 
 the IP Address of the NAT firewall.</p>
            </li>
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">Select 
 the<span style="font-weight: bold;"> Limit Port Range</span> option.</p>
            </li>
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">Enter 
 the <span style="font-weight: bold;">Minimum</span> and <span style="font-weight: bold;">Maximum</span> 
 port range.</p>
            </li>
            <li class="p-Topic-Text-Numbered">
                <p class="Topic-Text-Numbered">Click 
 <span style="font-weight: bold;">OK.</span></p>
            </li>
        </ol>
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